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镉元素符号Cd，原子序数48。银白色六方紧堆晶体金属，有延展性，易溶于硝酸、硝酸铵和热硫酸，难溶于稀盐酸或硫酸。在空气中缓慢氧化，表面附有棕色氧化物。不分解水。能直接与卤素和硫化合，呈正二价。单质在自然界中不存在，硫化镉矿是其唯一的真正的矿物，但它并不是镉的工业原料。大多以杂质的形式存在于锌矿(如ZnS)中。其烟尘和化合物毒性很大。制法：从炼锌、铜和铅的副产物中收集而得。用途：用于电镀，作合金、标准电池，其硫化物用作黄色颜料。
| Nominal mass | Accurate mass | % Natural abundance | Chemical form | Enrichment |
| 106 Cd | 105.906461 (7) | 1.25 (6) | metal, oxide, sulphate, chloride | 54 - 96+ |
| 108 Cd | 107.904176 (6) | 0.89 (3) | metal, oxide, sulphate | 41 - 76+ |
| 110 Cd | 109.903005 (4) | 12.49 (18) | metal, oxide, sulphate | 62 - 96+ |
| 111 Cd | 110.904182 (3) | 12.80 (12) | metal, oxide, sulphate, chloride | 65 - 96+ |
| 112 Cd | 111.902757 (3) | 24.13 (21) | metal, oxide | 86 - 98+ |
| 113 Cd | 112.904400 (3) | 12.22 (12) | metal, oxide, chloride | 93 - 96+ |
| 114 Cd | 113.903357 (3) | 28.73 (42) | metal, oxide, sulphate | 56 - 99+ |
| 116 Cd | 115.904755 (4) | 7.49 (18) | metal, oxide, sulphate | 29 - 98+ |
The nine stable Cadmium Isotopes are used for many different purposes. Cd-110 is used for the production of the radioisotope In-110, while Cd-112 is used in the production of the widely used diagnostic radioisotope In-111. Cd-108 is used in the production of Cd-109 which is a calibration source for 88 keV gamma radiation. The even numbered Cadmium Isotopes (mainly Cd-110, Cd-112, Cd-114 and Cd-116) are used to improve the power output and coherence length of HeCd lasers.
武汉易司拓普科技有限公司能提供丰度99.%以及更高丰度范围内各种纯度规格的镉Cd-106，镉Cd-108，镉Cd-110，镉Cd-111，镉Cd-112，镉Cd-113，镉Cd-114，镉Cd-118的镉Cd同位素产品。
